Commit f4c0468e authored Feb 02, 2018 by Dhinakaran Pandiyan Committed by Rodrigo Vivi Feb 15, 2018

drm/atomic: Handle 64-bit return from drm_crtc_vblank_count()



570e8696 ("drm: Widen vblank count to 64-bits [v3]") changed the
return type for drm_crtc_vblank_count() to u64.

The flip ioctl receives a 32-bit target sequence from user space and is
compared against the current sequence from drm_crtc_vblank_count(). So,
typecast return from drm_crtc_vblank_count() explicitly to add clarity.

__drm_crtcs_state.last_vblank_count however only ever stores the value from
drm_crtc_vblank_count() and can be upgraded to u64.

Cc: Keith Packard <keithp@keithp.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180203051302.9974-7-dhinakaran.pandiyan@intel.com

parent 3abe2413

drivers/gpu/drm/drm_plane.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -944,7 +944,7 @@ int drm_mode_page_flip_ioctl(struct drm_device *dev,
		if (r)
		return r;

		current_vblank = drm_crtc_vblank_count(crtc);
		current_vblank = (u32)drm_crtc_vblank_count(crtc);

		switch (page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET) {
		case DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE:

include/drm/drm_atomic.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -145,7 +145,7 @@ struct __drm_crtcs_state {
		struct drm_crtc *ptr;
		struct drm_crtc_state state, old_state, *new_state;
		s32 __user *out_fence_ptr;
		unsigned last_vblank_count;
		u64 last_vblank_count;
		};

		struct __drm_connnectors_state {

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